I know the oncoming traffic has the right of way, but right of way doesn't mean that they aren't allowed to be inconvenienced one tiny bit by the person coming in.

Assuming I'm on a 100 mph road (work with me here), I could pull out with nobody on the road. Then, starting at a slow speed, start accelerating. At this point I'm going about let's say, 85. Then some guy going 100 comes up and slams into me, and calls the police, saying I pulled right out in front of him. This is obviously an exaggeration, but the point still stands. You only have to give somebody so much time (dependent on the speed limit of the road to factor in breaking times and acceleration times) to react to you pulling out. To give an approximate range, I'd say you should never have to slam on your breaks, but having to break at all doesn't mean they're in the wrong.

Except no. You give them enough time to not hit you, you don't have to wait for a gap so large that you can pull out and get to full speed before they get to you, that's unreasonable, although it's polite if you can find a gap large enough to do so.

I know for sure its in the 2005 california book for the drivers license . the basic law states that the merging trafic never has the right of way. The right of way is always given to the vehicle currently traveling on the road. any traffic merging on to that road has to compensate for oncoming traffic

I know the oncoming traffic has the right of way, but right of way doesn't mean that they aren't allowed to be inconvenienced one tiny bit by the person coming in.

Assuming I'm on a 100 mph road (work with me here), I could pull out with nobody on the road. Then, starting at a slow speed, start accelerating. At this point I'm going about let's say, 85. Then some guy going 100 comes up and slams into me, and calls the police, saying I pulled right out in front of him. This is obviously an exaggeration, but the point still stands. You only have to give somebody so much time (dependent on the speed limit of the road to factor in breaking times and acceleration times) to react to you pulling out. To give an approximate range, I'd say you should never have to slam on your breaks, but having to break at all doesn't mean they're in the wrong.